STEPHEN CHANG-OH YANG MD, DDS
NPI 1225775299
Oral & Maxillofacial Surgery in San Francisco, CA
NPI Status: Active since May 19, 2022
Contact Information
521 PARNASSUS AVE # 440
SAN FRANCISCO, CA
ZIP 94143
Phone: (415) 476-3242
- Individual
- Male
- Oral & Maxillofacial Surgery
- Accepts Insurance
About STEPHEN YANG
This page provides the complete NPI Profile along with additional information for Stephen Yang, a provider established in San Francisco, California with a medical specialization in Oral & Maxillofacial Surgery. The healthcare provider is registered in the NPI registry with number 1225775299 assigned on May 2022. The practitioner's primary taxonomy code is 204E00000X with license number PTL15503 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1225775299
- Provider Name
- STEPHEN CHANG-OH YANG MD, DDS
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 521 PARNASSUS AVE # 440 SAN FRANCISCO, CA 94143
- Location Phone
- (415) 476-3242
- Mailing Address
- 513 PARNASSUS AVE # S321 SAN FRANCISCO, CA 94143
- Mailing Phone
- (415) 476-1239
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-19-2022
- Last Update Date
- 08-27-2025
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Oral & Maxillofacial Surgery
- Taxonomy Code
- 204E00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- PTL15503
- License State
- CA
- Taxonomy Description
- Oral and maxillofacial surgeons are trained to recognize and treat a wide spectrum of diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the oral and maxillofacial region. They are also trained to administer anesthesia, and provide care in an office setting. They are trained to treat problems such as the extraction of wisdom teeth, misaligned jaws, tumors and cysts of the jaw and mouth, and to perform dental implant surgery.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 1223S0112X | Dental Providers | Dentist | 109690 (CA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- BlueCare Dental 4 Kids? 1A - PPO
- BlueCare Dental 4 Kids? 1B - PPO
- BlueCare Dental? 1A - PPO
- BlueCare Dental? 1B - PPO
- BlueCare Dental? 1C - PPO
- BlueCare Dental? 1D - PPO
- BlueCare Dental 4 Kids? 1A - PPO
- BlueCare Dental 4 Kids? 1B - PPO
- BlueCare Dental? 1A - PPO
- BlueCare Dental? 1B - PPO
- BlueCare Dental? 1C - PPO
- BlueCare Dental? 1D - PPO
- BlueCare Dental 1D - PPO
- BlueCare Dental 4 Kids? 1A - PPO
- BlueCare Dental 4 Kids? 1B - PPO
- BlueCare Dental? 1A - PPO
- BlueCare Dental? 1B - PPO
- BlueCare Dental? 1C - PPO
- BlueDental Copayment Q - PPO
- BlueDental Copayment QF - PPO
- Humana Dental Smart Choice - PPO
- Humana Dental Smart Choice - Basic - PPO
- Humana Dental Smart Choice - High - PPO
- Humana Dental Smart Choice - Lite - PPO
- Humana Dental Smart Choice - Low - PPO
- Lone Star - Smile Now - PPO
- Smile Now Arizona - No Waiting Period PPO - PPO
- Smile Now Michigan - No Waiting Period PPO - PPO
- Smile Now Ohio - No Waiting Period PPO - PPO
- Smile Now Texas- No Waiting Period Plan - PPO
- Smile Now Utah - No Waiting Period PPO - PPO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1225775299, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 61 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1225775299, enumerated as an "individual" on May 19, 2022.
The provider is located at 521 PARNASSUS AVE # 440 SAN FRANCISCO, CA 94143 and the phone number is (415) 476-3242.
Oral & Maxillofacial Surgery with taxonomy code 204E00000X.
The provider might be accepting Accepts: Blue Cross and Blue Shield of Montana, Blue Cross. Please consult your insurance carrier or call the provider to verify.
